BioRAT (Biological Research Assistant for Text mining) is a search engine and information extraction tool for biological research.A large and growing amount of information is published every year in scientific journals. In the biomedical field, there are thousands of journals, each publishing many issues annually, any one of which could contain information that is relevant to a researcher. However, no one has time to read every paper. One solution is to use a software tool to search through publications to identify important results in response to the users’ queries. BioRAT is such a tool.